Question

Assume, I have an object x of MyClass. What method is called, when I do puts x? I need to override it with my own one.

I thought it was .inspect, but somehow overridden inspect isn’t being called.

For example, I have a class Sum:

class Sum
  initiazlie a, b
     @x = a + b
  end
end

And I wanna access the result like this:

s = Sum.new(3,4)
puts s         #=>    7   How do I do this?
puts 10 + s    #=>   17   or even this...?

Answer 1

It calls: to_s

class Sum
  def to_s
    "foobar"
  end
end

puts Sum.new #=> 'foobar'

Or if you want, you can just call inspect from to_s, so that you have a consistent string representation of your object.

class Sum
  def to_s
    inspect
  end
end